EP 3421361 B1 20190612 - ARTICULATED ROTOR SYSTEMS WITH PITCH INDEPENDENT DAMPING
Title (en)
ARTICULATED ROTOR SYSTEMS WITH PITCH INDEPENDENT DAMPING
Title (de)
GELENKIGE ROTORSYSTEME MIT PITCHUNABHÄNGIGER DÄMPFUNG
Title (fr)
SYSTÈMES DE ROTOR ARTICULÉS AVEC AMORTISSEMENT INDÉPENDANT DU TANGAGE
Publication
Application
Priority
US 201715636448 A 20170628
Abstract (en)
[origin: EP3421361A1] A proprotor system (32a, 32b) operable for use on a tiltrotor aircraft (10) having a helicopter flight mode and an airplane flight mode. The proprotor system (32a, 32b) includes a rotor hub (102) and a plurality of proprotor blades (34) coupled to the rotor hub such that each proprotor blade has three independent degrees of freedom relative to the rotor hub including blade pitch about a pitch change axis (128), blade flap about a flapping axis (130) and lead-lag about a lead-lag axis (132). Each of a plurality of spherical bearings couples one of the proprotor blades (34) with the rotor hub (102) . In addition, each of a plurality of lead-lag dampers (134) couples one of the proprotor blades (34) with the rotor hub (102), wherein each lead-lag damper is aligned with the pitch change axis (128) of the respective proprotor blade, thereby providing pitch independent lead-lag damping.
IPC 8 full level
B64C 27/35 (2006.01); B64C 27/51 (2006.01); B64C 27/635 (2006.01); B64C 29/00 (2006.01)
CPC (source: EP US)
B64C 11/06 (2013.01 - US); B64C 11/32 (2013.01 - US); B64C 27/35 (2013.01 - EP US); B64C 27/51 (2013.01 - EP US); B64C 27/635 (2013.01 - EP US); B64C 29/0033 (2013.01 - EP US); F16F 15/121 (2013.01 - US); F16C 23/043 (2013.01 - US); F16C 27/02 (2013.01 - US); F16C 2326/43 (2013.01 - US); F16F 15/1208 (2013.01 - US); F16F 15/124 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3421361 A1 20190102; EP 3421361 B1 20190612; US 10457380 B2 20191029; US 2019002085 A1 20190103
DOCDB simple family (application)
EP 18167032 A 20180412; US 201715636448 A 20170628